Offset and Backspacing?
Ok so as the title implies i need some rim info. I've looked at other threads on the offset and backspacing and am still lost for the most part. The wheels I'm looking at have a 4-7/8" backspacing and a +10 offset. In general terms what does that mean and how will it differ from my stock rims?
UNDERSTANDING WHEEL TERMINOLOGY
The following is a list of defined terms which need to be understood before aftermarket wheels can be intelligently purchased.

RIM WIDTH - The distance between bead mounts (where the tire attaches to the rim)
CENTERLINE - Half of the rim width (center)
OFFSET - The distance from the centerline to the hub mount pad (where the wheel attaches to the hub)
POSITIVE OFFSET - Centerline is outside of hub mounting pad (increases vehicle track)
NEGATIVE OFFSET - Centerline is inside of hub mounting pad (decreases vehicle track)
Note: Using wheels with greater negative offset than stock can increase strain on wheel bearings and spindles. Inspect more frequently. Be sure to check clearance with frame and inner fender UNDER CORNERING SITUATIONS!
REAR SPACING / REAR BACKSPACING / BACKSPACING
The distance from the inner edge of the wheel to the hub mount pad
Note: Sometimes the distance from the outer edge of the wheel to the hub mount pad is referred erroneously to as offset. BE CAREFUL!
BOLT PATTERN:
- Number of lugs
- Bolt Circle - The diameter of the imaginary circle which intersects the centers of the lug holes.
The following is a list of defined terms which need to be understood before aftermarket wheels can be intelligently purchased.

RIM WIDTH - The distance between bead mounts (where the tire attaches to the rim)
CENTERLINE - Half of the rim width (center)
OFFSET - The distance from the centerline to the hub mount pad (where the wheel attaches to the hub)
POSITIVE OFFSET - Centerline is outside of hub mounting pad (increases vehicle track)
NEGATIVE OFFSET - Centerline is inside of hub mounting pad (decreases vehicle track)
Note: Using wheels with greater negative offset than stock can increase strain on wheel bearings and spindles. Inspect more frequently. Be sure to check clearance with frame and inner fender UNDER CORNERING SITUATIONS!
REAR SPACING / REAR BACKSPACING / BACKSPACING
The distance from the inner edge of the wheel to the hub mount pad
Note: Sometimes the distance from the outer edge of the wheel to the hub mount pad is referred erroneously to as offset. BE CAREFUL!
BOLT PATTERN:
- Number of lugs
- Bolt Circle - The diameter of the imaginary circle which intersects the centers of the lug holes.
Here this is easier haha
https://www.f150forum.com/showthread.php?t=116762
https://www.f150forum.com/showthread.php?t=116762
jferg92, you do not have permission to access this page. This could be due to one of several reasons:
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^ well that's annoying, try going to the how to submissions page and see if you can access it there... It's been there for a while, I just asked a moderator ifthey could get a push on the approval...
Well i've tried to reply twice and that same access block so maybe third times a charm. But thanks A7X i was then able to view it and RaptorX7 for the info. So basically the rims with a +10mm offset will stick out slightly more than stock and the 4-7/8" backspacing is what makes it a "deeper dish" compared to stock
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Originally Posted by jferg92
Well i've tried to reply twice and that same access block so maybe third times a charm. But thanks A7X i was then able to view it and RaptorX7 for the info. So basically the rims with a +10mm offset will stick out slightly more than stock and the 4-7/8" backspacing is what makes it a "deeper dish" compared to stock


